1365740685 has 24 divisors (see below), whose sum is σ = 2390730264. Its totient is φ = 721180800.

The previous prime is 1365740659. The next prime is 1365740687. The reversal of 1365740685 is 5860475631.

1365740685 is a `hidden beast` number, since 13 + 6 + 574 + 0 + 68 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 81378441 + 1284362244 = 9021^2 + 35838^2 .

It is not a de Polignac number, because 1365740685 - 2¹⁴ = 1365724301 is a prime.

It is a super-3 number, since 3×1365740685³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1365740685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365740687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145702 + ... + 154791.

It is an arithmetic number, because the mean of its divisors is an integer number (99613761).

Almost surely, 2^1365740685 is an apocalyptic number.

1365740685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1365740685 is a deficient number, since it is larger than the sum of its proper divisors (1024989579).

1365740685 is a wasteful number, since it uses less digits than its factorization.

1365740685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300605 (or 300602 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 1365740685 is about 36955.9289559876. The cubic root of 1365740685 is about 1109.4883568463.

The spelling of 1365740685 in words is "one billion, three hundred sixty-five million, seven hundred forty thousand, six hundred eighty-five".